Overview / Web Technology

Web technology reference for developers

HTML

Structure of content on the web

CSS

Code used to describe document style

JavaScript

General-purpose scripting language

HTTP

Protocol for transmitting web resources

Web APIs

Interfaces for building web applications

Web Extensions

Developing extensions for web browsers

Accessibility

Build web projects usable for all

Web Technology

Web technology reference for developers

Overview / MDN Learning Area

Learn web development

MDN Learning Area

Learn web development

HTML

Learn to structure web content with HTML

CSS

Learn to style content using CSS

JavaScript

Learn to run scripts in the browser

Accessibility

Learn to make the web accessible to all

Overview

A customized MDN experience

AI Help

Get real-time assistance and support

Updates

All browser compatibility updates at a glance

Documentation

Learn how to use MDN Plus

FAQ

Frequently asked questions about MDN Plus

Playground

Write, test and share your code

HTTP Observatory

Scan a website for free

AI Help

Get real-time assistance and support